BASE jumping

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A type of low-altitude sky diving/extreme sport—invented by Carl Boenish in 1978 in Texas—in which participants jump—with parachute—from 4 types of structures that constitute the acronym, BASE:
• Buildings
• Antennas/Aerials
• Spans (bridges)
• Earth (cliffs)

480 men and women have been awarded an official BASE number. As of April 2009, 133 people have died BASE jumping, with an estimated 1 fatality/60 participants

BASE jumping

Sports medicine An extreme sport in which participants jump–with parachute-from 4 types of structures that constitute the acronym: Buildings, Antennas, Spans–bridges, Earth–cliffs

BASE jump·ing

(bās jŭmp'ing)
A sport in which participants use a parachute and jump from four types of fixed man-made or natural objects: building or skyscraper, antenna or tower, span (bridge arch or deck), and earth (cliff).
References in periodicals archive ?
The Burj Khalifa had taken in its first base-jumping off the building a day after its inauguration when two Emirati skydivers jumped off the observation deck on the 124th floor of the buildings.
One of the base-jumping parachutists, Australian Roland Simpson, was seriously injured in the exhibition jump.
Base-jumping, which is illegal in Britain, involves jumping off a high structure - tower blocks, masts, bridges and cliffs - with a parachute on your back.
I also met Moe Vietto when in California and he introduced me to BASE-jumping,''added Eric.
As for BASE-jumping events, Knutson is plugged into the International Pro Base Circuit, which includes more than 70 competitors on 10 teams.
That's exactly what a Scots daredevil did - and he filmed his 10-second, 215ft descent to share the sensation with his fellow BASE-jumping enthusiasts.
Jumpers from all over the world including world base-jumping champion Claus Brenk of Germany converged on the city for the event.
The world of base-jumping is exposed in Graeme Chalmers's documentary.